Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab63bb3d3dc54447…

MALICIOUS

PDF

40.1 KB Created: 2020-08-28 00:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 206a50d699d587d98017b7f50c67050f SHA-1: 7a4ad865330b6db4d33a60d519a90aae49a78105 SHA-256: ab63bb3d3dc5444797439836fefb7ce4272a697b771f3972d26add3b62b5098f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to external malicious content. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to attract search engine traffic and potentially mask the malicious redirector. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=poor+unfortunate+souls+book
    • http://files.hivekitchenstore.com/uploads/1/3/1/6/131606248/7826733.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13164506765.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/xekibilimiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/finding_fish_book_summary.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/70639432435.pdf
    • https://cdn.shopify.com/s/files/1/0437/1641/1547/files/balancing_equations_practice_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/niwafisosu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/dawaziniletu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5357/2515/files/78600141722.pdf
    • https://cdn.shopify.com/s/files/1/0429/3001/2316/files/pudigekavasuwegun.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/behavioral_interview_questions_and_answers_101.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/xazafubuxikozikebota.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/33115951875.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006071.bin
602fd2f63b8d46e7206d8532c086b7db32ffc8fa6dbb9fa8dae86f75eb5c3298
pdf-font-stream PDF embedded font (sfnt) at offset 0x6071 4964 bytes
font_01_sfnt_off0000715f.bin
2487aa396d58ed5fd07a824d0712a781774b724ad5560e8aab77e6577061c9eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x715F 10120 bytes